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I have to hit the AC botton every 30 seconds or so for cold air

drparpor on Wed March 21, 2012 10:32 AM User is offline

Year: 1993
Make: Mitsubishi
Model: 3000 GT

The AC works for only 30 seconds then it turns into fan and the light for the AC turns off. then i have to press the ac botton again which provides cold air for another 30 seconds then becomes regular fan air again.
Does anyone know the problem?
I tried to charge the AC but it's full
Thank you

mk378 on Wed March 21, 2012 10:39 AM User is offline

If it gets cold once, you have enough refrigerant. Don't try to add more; that's not the problem.

Likely that car has an A/C amplifier. If the clutch gap is marginal and the compressor doesn't always engage when it should, the amplifier is designed to lock it out until the button is pressed again. A flakey compressor relay would do the same thing. Or the amplifier itself could be defective.

Edited: Wed March 21, 2012 at 11:07 AM by mk378

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